As detailed on the official U.S. Army website, “the Army, as one of the three military departments (Army, Navy, and Air Force) reporting to the Department of Defense, is composed of two distinct and equally important components: the active component and the reserve components. These reserve components are the United States Army Reserve and the Army National Guard.”
The heart of the mission of the U.S. Army is “to fight and win our Nation’s wars by providing prompt, sustained land dominance across the full range of military operations and spectrum of conflict in support of combatant commanders.”
